Dryopteris filix-mas 'Undulata Robusta'

Superb hybrid Male Fern (D. affinis x D. filix-mas) with a sturdy upright habit.
Deeply divided, often overlapping, deep green fronds, give it an almost wavy or ruffled appearance.
Semi-evergreen 30"-36" Zone 5

Available at:   www.rickscustomnursery.com